Projection apparatus.



E. W. GOODRIGH. M PROJECTION APPARATUS.

I APPLICATION I'LLED DEC. 30, 1910. 1 @38,349 Patented Sept. 10, 1912.

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E. W. GOODRIGH.

PROJECTION APPARATUS.

APPLICATION FILED 13110.30, 1910.

1,038,349, Patented Sept. 10, 1912.

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M I v J E. W. GOODRIGH. PROJECTION APPARATUS. APPLICATION FILED DEC. 30, 1910:

Patented Sept. 10,1912.

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Patented Sept. 10, 191-2.

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projection work;

EMORY \V. GOODRICH, OF BOSTON, MASSACHUSETTS.

PROJECTION APPARATUS.

' Specification of letters Patent.

Patented Sept. 10,1912.

Application filed December 30, 1910. Serial No. 600,165.

To all whom it may; concern:

Be it known that I, EMoni W. Gooonrcn, a citizen of the United States, residing at Boston, county of Sufiolk, and State of Massachusetts, have invented an Improvement in Projection Apparatus, of which the following description, accompanying drawing, like characters on like parts.

This invention relates to projectionapparatus of that type which can be used for both opaque and transparent projection I is a specification, the drawing representing work, and the objects of the invention are to provide a novel pro ection apparatus which is comparatively simple and which can be readily adapted either for opaque or transparent projection work and which can also.

be used for microscopic projection work; and to provide an apparatus by which the image of either the transparent or the opaque object may be projected onto the screen with the apparatus in any one of several positions Other objects of my invention will more fully hereinafter appear and the novel features of the invention will then be pointed out in the appended claims.

Referring now to the drawings, Figure 1 is a side view of theprojection apparatus embodying my invention showing it adapted for transparent projection work; Fig. 2. is a similar view showing it adapted for opaque projection work; Fig. 3 is a side view showing the parts in position for, microscopic Fig. i is a sectional view on the line m-m, Fig. 3; Fig. 5 shows a modification of the invention.

3 designates a lamp house of any suitable or usual construction having a .lamp 4: or other source of illumination therein. 1 have not illustrated the lamp in detail as it may be of any suitable construction and forms no part of the present invention. This lamp house is movably mounted on a base or support 5 so that it can be tipped into different positions according to the use to which the apparatus is to be put. In the present embodiment of 'my invention the lamp house is pivoted at 7 to brackets 6 secured to the base or table 5, the pivotal point 7 being situated near the lower front corner of the lamp house. This permits the'lamp house to be tipped from its horizontal posi tion shown in Fig. 1, in which position it is in connection with theproperly placed for either transparent proj ection work or microscopic projection work, I

into the inclined position shown in Fig. 2, which is. the position adapted for opaque projection work. The lamp is supported in its horizontal position shown in Fig. 1 by means of a suitable post or rest 8 carried by the table 5 and it may be sustained in its inclined position shown in Fig. 2 in any suitable way. I have herein shown for this purpose a strut or brace 9 which is pivoted to the table at 10 and is adapted to engage the under side of thclamp house 3,said brace being acted on by a suitable spring 11 which tends to throw it upwardly while permitting it to fold downwardly against the table. lVhen the lamp is in its horizontal position, the strut 9 may be held against the table by a button or catch 70' which can be turned to release the strut whenever the latter is to be used. "When the lamp house is tipped upwardly and the strut is released, the spring 11 will throw the strut into its operative position against the stop 12 carried by the lamp house. as seen in Fig. 2,- and the stop serves to hold the strut in its operative position. Any other suitable way of supporting the lamp house in its inclined position may beadopted, however. I have herein shown each bracket (3 as'providcd with a rest 13 against which the front face 1-1 of the lamp house engages when the latter is in its inclined position and this rest combined with the strut 9 serves to firmly hold the lamp house in such position. The'iiace 14 of the lamp house is provided with an opening 15, see Fig. 4:, in which opening aresustained condensing lenses 16 which may have any suitable or usual construction.

17 is a housing or light hood adapted to sustain the objectives for both the transpar- V out and the opaque projection work. The objective for the transparent projection work is shown generally at 18 and is mounted on one side of the housing 17 to extend at rightangles therefrom, and this objective light hood or thrown down a horizontal axis so as to 30 sleeve 25 is beam of-light 65 an angle of 90 side 21 which-is in a plane at right angles to. the objective and at an angle to the collimated beam of light.

Situated inside of th'e'light hood 17 is a 5 reflector 23 which may be either a mirror or a polished-metal surface, or a reflector Thls reflector is of any suitable character. hinged within the light hood at 32 and is adapted to be folded againstlthe side of the into the dotted llne position Fig. l'therebyt reflect the beam of light collimated by the condensing lenses upwardly'into the objective 18.

The housing 17 is mounted to turn about bring either of the ob ectives 18 or 20 into operative position. The housing 17 is herein shown as sustained bythe lamp house 3 and 'I provide for turning the housing by using a swivel connec- 20 ;'tion between the latter and the lamp house.

"Fig. 4 shows this swivel connection most clearly and on referring to said figure, it will be seen that the housing 17 is provided with a sleeve v which encircles and can '25 turn about a bushing or sleeve 26 projecting from the lamp house 3. The sleeve 25 is in teriorly shouldered at 27 and the sleeve 26 -is provided with. the exterior shoulder or flange 28 engagin the shoulder27. The p 'ovi ed with a handle 29 by which the housing 17 may be turned into its proper position axially. uin order to provide'fpr assembling th poli'ts I propose to nialieflthe sleeve 26' separate film the front side 14 of the-lamp house 3 and to slip said sleeve 25 from the interior of the housing 17, and thereafter permanently secure the sleeve 26' to the lamp house by means of rivets or screws 30.

When the device isto be used for transsleeve through the lamp house so as to tion, as shown in Fig. 1, and the reflector 23 is then thrown down into the dotted line position so that it will reflect the collimated upwardlyinto the objective 18. Said objective hasa reflector 31 associated therewith which reflects the project? ed image onto the screen. The reflector 23 may be swung from one position to the other byany suitable means, as, for instance, by a thumb-piece 24 which is secured to the shaft on which the reflector is sustainethand a rest 'or stop 71 is provided to support it' at the proper angle. When the reflector is not in use it may beswung into ino erative 'position against the side of the lig t hood,

17 and held there by any suitable catch 72.

This catch can be readily operated from the exterior of the light hood when the reflector is to be released. When. the apparatus-is to be used for opaque projection work the light hood. 17 is turned through to bringflthe objective 18 ent projection into a horizontal position and the objective 20into a vertical position, and then the lamp house and light hood are ti ied up into the angular position shown in Fig. 2 so as to bring the open side 21 of the light hoodinto horizontal position. The mirror or reflector 28 is sition-against the side of the light hood l7 where'it is retained by the catch 72. beam of light oollimated by the condensing lenses 16 is thrown through the open side 21 of the light hood 17 onto an opaque object 33 supported on a table'34, and the light rays reflected from this illuminated object 33 pass through the objective 20 and are reflected by the mirror or reflector 35 onto the screen. The shape of the light hood 17 is such that when the lamp house is tipped into itsinclined position shown .in (Fig. 2, the objective 20 will stand vertically and therefore the reflector 35 will reflect the projected image in the same direction as the reflector 31. when the objective 18 is in operative position.

To use the apparatus for microscopic pro-.

jection work the lamp is swun into its horizontal position, as shown in Figs. 1 and 3, and a support for the projecting microscope is provided which isadapted to sustain said microscope in line with the open side 21 of the lighthood 17 so that the collimated beam of light will be projected through said open side 21 and directedyto the projecting microscope. Said support is shown. at 40 and'it is pivoted -to the table 5 in any suitable way, as at 41. Said support carries a projecting microscope 42, 43 of any usual construction, a detailed description of which is not necessary as it is well known and forms no part of my invent-ion. This support is provided with a fhilelld 44 to prevent too great diffusion of i t. By swiveling the light hood to the lamp house it is possible to use the device for hot opaque and transparent projection work with the light hood in different relative positions n Fig. 1, theapparatus is shown as arranged for transparent projection work with the objective 18'standing vertically. The device can be used for trans arwork, however, if the light hood is turned aroundthrough 90 so that the objective 18 will stand horizontally.

The table 5 is mounted on a turn table support 78 of any suitable construction so that said table can be turned about a verticala-xis and by turning the light hood into the position shown in Fig. 5, that is, with the objective 18 standing vertically and with the objective 20 in a horizontal plane, and by turning the table '5 on itsturn-table support 78, the device may be "used for opaque projection work without the necessity of tipping the lamp house into theiinswung into inoperative po- The , situated with its optical clirled position. To do this necessitates the usebf an auxiliar holder 81 for the opaque object. This hol er is shown as carried by an arm 82 pivoted at 83 to a support Set that is detachably sustained by a bracket 85 carried by the side of the light hood. A spring 86 connecting the arm 82 and sup-port 84: serves to yieldingly hold the holder 81 against the open side 21 of the light hood. This arrangement is suitable for projecting images of opaque objects, such as cards or other'articles that can be shown in either a vertical or a horizontal position. This position of the projection apparatus is simiar to that shown in Fig, 1 so that by the use of this auxiliary holder 81, it'is possible to project images of either opaque or trans parent objects without shifting the position of the lamp house, and by simply turning the table 5 about its turn'table support Y8 so that the image will be projected in the direction of the screen and in addition throwing the reflector 23 into or out of operative position according; as the image is from an opaque or transparent article.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is: v p

1. In a projection apparatus, the combination with a lamp house provided with means to project a beam of light, of means supporting said lamp house to permit it to be turned into positions with the beam of light extending either horizontally or in a downwardly-inclined direction, a housing secured to and movable with the lamp house, said housing being open on the side toward which the beam of light is v irected, and an objective lens carried by the housing and situated with its optial axis directed toward said open side.

2. In a projection apparatus, the combination with a lamp house provided with means to project a beam of light, of means supporting said lamp house to permit it to be turned into positions with the beam of light extending either horizontally or in a downwardly'inclined direction, a housing secured to and movable with the lamp house, said housing being open on the side toward which the beam of light is directed, and an objective lens carried by the housing and axis extending at an angle to the beam of light. and directed toward the open side.

3. In a projection apparatus, the combination with a base or table, of a lamp house, provided with means to project abeam of light, means tor supporting said lamp house for movtmicnt into diilercnt positions about an axis transverse to the axis of the beam of light, a housing secured to and movable with the lamp house and provided with an open side in line with said beam, and an objective .iens sustained by the housing and having 01705001310 objective supported in nation with a lamp house its optical axis directed toward said open side.

4. In a projection apparatus, the combination witha lamp house, a source of illumination therein and condensing lenses, of a housing swiveled to said lamp house to turn about the beam of light as an axis, and two objectives carried by said housing.

5. In a projection apparatus, the combination with a lamp house, a source of illu mination therein. and condensing lenses, of a housing swiveled to the lamp house to turn about the axis of the beam oft light collimated by the condensing lenses, said housing having an angularly-disposed open side in the path of said beam, an opaque projection objective carried by the housing in line with said open side, a transparent projection objective also carried by the housing, and a movable reflector within the housing to tiect the collimated beam of light into the latter objective. I

6. In a projection apparatus, the combination. with a lamp house, a source of illumination therein and condensing lenses, of a housing swiveled to the lamp house to turn about the axis of the beam of light collimated by the condensing lenses, said housing having an angularly-disposed open side in the path of said beam, an opaque projection objective carried by the housing in line with said open side, a transparent projection objective also carried by the housing, a movable retlector within the housing to refiect the collimated beam of light into the latter objective, and a support by which the lamp house is pivotally sustained whereby the latter may be placed in a horizontal position for transparent project-ion work or tipped into an inclined position for opaque projection work.

7. In a projection apparatus, the combination with a lamp house having a source of illumination therein and condensinglenses, of a housing connected to the lamp house and provided .with an open side, through which the beam of light collimated by the condensing lens is directed, a transparent projection objective extending laterally from within the. housing to reflect the collimatcd beam of light into said objective, and a miline with said open side.

8. In a projection apparatus, the combiprovided with means to project a beam of light, of .means supporting saidla-mp house to permitit to be turned into different angular positions about an axis transverse to said beam of light, a housing secured to and movable with the lamp house and provided with an open side toward which said beam of light is pro jccted, and two objectives carried by said housing.

said housing, a movable reflector either into a horizontal position or into a,

9, In a projection apparatus, the combination with a lamp house provided with means to project a beam of light, of means supportingsaid lamp house to permit 5 it to beturned into different angular positions about an axis transverse to said beam of light, a housing secured toand movable with the'lamp house and provided with an said beam of light,

open sidetoward which is projected, two objectives carried by said housing, one of said objectives having its optical axis directedtoward said open'side, and a movable reflector to reflect the beam of light into the other objective.

l0. In a projection apparatus, the combination with a lam house. provided with means to project a cam of light, of means supporting said lamp house to permit it to be turned aboutan axis transverse to the cam of light to bring said beam of light supporting said lamp house to permit it to be turned about an axis transverse to the beam of light into positions to project the beam of light either horizontally or downwardly, a housing secured to and movable with the lamp house, said housing being open on the side toward-which the beam of light is directed, an objective carried by the jective carried by the by the housing.

housing and situated with its optical axis directed toward the open side, a second 0bhousing, and a movable refiector to reflect the beam of light toward the second objective.

In a projection apparatus, the combination with a lam house provided with means to project a cam of light, of means supporting said lamp house to permit it to be turned about an axis transverse to the beam of light into positions to project the beam of light either horizontally or downwardly, a housing secured to and movable with the lamp house, said housing being open on the side toward which the beam of light is directed, and two objectives'carried 13. In a projection apparatus, the combination with a lamp house, a source of illumination therein, and condensing lenses, of a housing swiveled to the lamp house to turn relative thereto about the beam of light as an axis, and an objective carried by said housing.

14. In a projection apparatus, the combination with a. lamp house, a source of illumination therein, and condensing lenses, of a housing swiveled to the lamp house to turn relative thereto about the beam of light as an axis, said housing being open on that side toward which the beam of light is directed, and an objective carried by the housing and situated with its optical axis directed toward said open side.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

- EMORY w. GOODRICH.

Witnesses: LOUIS 0. SMITH,

THoMAs J. \DRUMMOND. 

